Strategies for Sustainable Growth and Resilience

Sustainability Across the Supply Chain Supporting our industry partners on lower carbon solutions. 35447 A 982 CAT KNIFE CAT RIVER I Knife River invested in Blue Planet to VER Knife River partners with suppliers ■ Cement manufacturers producing type 1L cement Equipment manufacturers focused on hybrid construction equipment Renewable diesel becoming available Knife River partners with customers Developing Environmental Product Declarations (EPD) for ready-mix and asphalt products to support customers' goals of lower carbon construction. ■ EPDS aligned with Federal Buy Clean Initiative Knife River partners with investors Measuring and reporting Scope 1 and 2 emissions 2021 - Implemented processes and systems to capture carbon baseline data beginning in 2022 pursue commercial means of creating and marketing synthetic limestone, using Blue Planet. 2022 Captured and calculated Scope 1 & 2 emissions I sequestered carbon dioxide that will ultimately result in a net-zero or net-negative carbon footprint 2023 Engaged third-party audit firm to review data- capture processes and CO2e calculations of 2022 emissions 2024 - Expects to publish first Knife River Sustainability Report KNIFE RIVER 36

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